Sash-lock.



FRANK E. 'GREIS, OF SYRAOUSE, NEW YORK.

SASH-LOCK.

Specification of Letters Patent.

Patented Dec. 1o, 1907.

Application filed October l. 1906. Serial No. 336.820.

To all whom it may concern:

Be it known that I, FRANK E. GEErs, a citizen of the United States, andresident of Syracuse, in the county of Onondaga, in the State of NewYork, have invented new and useful Improvements in Sash Locks, of whichthe following, taken in connection with the accompanying drawings, is afull, clear, and exact description. i

The object of this invention is to provide a sash operating mechanismwhich shall be simple and inexpensive in construction and shallautomatically raise the sash to its open position and securely lock thesash at any desired height and also in its closed position. And to thatend the invention consists in the novel construction and combination ofparts hereinafter described and as shown in the accompanying drawings,in which Figure 1 is an elevation of a Window equipped with my improvedsash lock, portion of the window casing being broken away to expose someof the essential parts of the sash-operating mechanism: Fig. 2 is atransverse section on the line -XX:

y. of Fig. 1, and Fig. 3 isl an enlarged transverse section on the line-Y-Y-z of Fig. 1.

-A-A- represents the sash, and -B- the 'window-casing,` which latter. isformed with the vertical boxes -a-ofin which the counter weights --O-C-are guided in the usual manner. Said weights being connected to stoutcords -bwhich run on pulleys -c-o pivoted to the casing HB- and areattached to the stiles or vertical side rails of the sash. The weights-O-C- preponderate the sash to cause the sash to e automatically raisedthereby.

To control the rising of the sash and to lock it at any desired heightand also in its closed position, I attach to the window-casing tworatchet racks Z-d which extend to the bottom of the sash and aredisposed with the abrupt or horizontal faces of the teeth presenteddownward. Said ratchetracks are seated in vertical grooves -eein thecasing to prevent them from coming in contact with the vertical ed es'ofthe sash.

The underside of the ottom of the sash is provided with a longitudinalgroove -fextending across the entire width of the sash. In the saidgroove are located two sashlocking bars -g-gextending through oppositeends of the groove -fand carried at the central portions of theirlengths on hangers -i-h pivoted to the sashv within the roove f-. Saidhangers allow the loc 'ng bars -g-g to move longitudinally to and fromdirect engagement with the ratchet racks. The inner ends of said lockingbars are deflected at right angles in the form of lingers #g1-g1- whichprotrude through a longitudinal slot fiin the sash and are suitablyshaped for manipulation. Said fingers normally rest on the ends of theslot -'ias shown in Fig. 1 to limit the downward movement vof therackengaging ends of the bars -g,-g-. suitable spring j is arranged inthe groove -f-- and interposed between the inner ends ofthe bars d g--gto force both of said bars simultaneously into engagement with theratchet racks -d-d-- I preferably employ a spiral spring interposedbetween the deflected inner ends of the bars -g-gand supported onahorizontal rod -lwhich is attached atone end to one of the bars -gandslides freely at its oppoite end in a perforation in the other of saidars.

The operation of the sash lock is as follows, to wit: The sash is'closed by the person pushing the sash down in opposition to the upwarddraft exerted on the 'sash by the preponderating weights -O-C-. In thedownward movement of the sash the pivotal supports of the locking-barsg-g allow the said bars to yield endwise and thus slide over the teethof the ratchet racks -d-dand as soon as the said movement of the sashceases, the spring forces both bars gigsimultaneously outward and intoengagement with the horizontal or abrupt faces of the teeth of the tworatchet racks A and thus lock the sash from upward movement. It will beobserved that the sash is locked at both of its vertical edges and isthus relieved from lateral strain, and the locking -is effected by theoperator releasing his hold on the iingers -gl-gL- of the twolocking-bars, the released fingers coming in contact with the ends ofthe slot fiserving to sustain the locking-bars in their engagement withthe ratchet racks.

What I claim as my invention is In combination with the ratchet racksattached to the window-casing and disposed and norlnall)T resting on theends of thc slot, 10 and an expansive spring interposed between theinner .ends of said locking-bars as sot forth,

FRANK E. GREIS.

Witnesses:

J. J. LAAss, FRED W. HAMMOND.

